Sagittal Plane Correction With Pass-LP Device in Adult Deformity Patients

Inclusion criteria * Lumbar or thoraco-lumbar Adult Deformity requiring posterior spinal instrumentation and fusion like: * Scoliosis * Kyphosis * Kyphoscoliosis * Patient with a Cobb angle ≥ 30° and/or confirmed sagittal imbalance defined as sagittal vertical axis (SVA) more or equal to 5cm and/or a loss of lumbar lordosis versus the pelvic incidence * Patient ≥ 21 years old * Surgery that requires 4 or more levels to be operated * Patient with complete pre-operative radiographic data: antero-posterior and lateral standing full spine x-rays (from hips to C2) and lateral bending x-rays (standing) * Patient able to complete a self-administered questionnaire * Patient able to sign a consent form Exclusion criteria * Patient operated with posterior spinal fusion without PASS LP device * Patients who required a Vertebral Column Resection technique surgery * Neuromuscular scoliosis or diseases and any neuro-related pathology * Spinal cord abnormalities with any neurologic symptoms or signs * Primary abnormalities of bones (e.g. osteogenesis imperfecta) * Recent significant trauma * Patient is involved in current medical litigation * Metabolic spinal pathology * Pathologic obesity (BMI \> 40) * Patients with infection (in particularly osteomyelitis) * Patient \< 21 years old * Pregnancy or intended to get pregnant during the next 3 years * Insulin-dependent diabetes * All other contra-indications given in the PASS® LP System instructions for use * Patient unable to sign an informed consent form * Patient unable to complete a self-administered questionnaire